import okhttp3.Dns.Companion.SYSTEM

/**
 * A domain name service that resolves IP addresses for host names. Most applications will use the
 * [system DNS service][SYSTEM], which is the default. Some applications may provide their own
 * implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses,
 * or to force a specific known IP address.
 *
 * Implementations of this interface must be safe for concurrent use.
 */

     *
     * 1) IP Address - If a dot-quad IP string is used with getByName (or used
     * to create an NbtAddress internal to this netbios package), no query is
     * sent on the wire and the only state this object has is it's IP address
     * (but that's enough to connect to a host using *SMBSERVER for CallingName).
     *
     * 2) IP Address, NetBIOS name, nodeType, groupName - If however a

In the DNS server(s) you would configure a record (an "`A record`") to point **your domain** to the public **IP address of your server**.

You would probably do this just once, the first time, when setting everything up.

/// tip

This Domain Name part is way before HTTPS, but as everything depends on the domain and the IP address, it's worth mentioning it here.

///

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		t.Fatalf("%s.  Unable to get IP addresses of this host.", err)
	}

	for _, addr := range addrs {
		var ip net.IP
		switch v := addr.(type) {
		case *net.IPNet:
			ip = v.IP
		case *net.IPAddr:
			ip = v.IP
		}

		if ip.To4() != nil {
			localIP4.Add(ip.String())
		}
	}

	// Filter ipList by IPs those do not start with '127.'.

MinIO can be accessed via port {{ .Values.service.port }} on an external IP address. Get the service external IP address by:
kubectl get svc --namespace {{ .Release.Namespace }} -l app={{ template "minio.fullname" . }}

Note that the public IP may take a couple of minutes to be available.

You can now access MinIO server on http://<External-IP>:9000. Follow the below steps to connect to MinIO server with mc client:

    NetbiosName getUnknownName();

    /**
     * Retrieve all addresses of a host by it's address. NetBIOS hosts can
     * have many names for a given IP address. The name and IP address make the
     * NetBIOS address. This provides a way to retrieve the other names for a
     * host with the same IP address.
     *
     * @param addr
     *            the address to query
     * @return resolved addresses
     * @throws UnknownHostException

and `bucket2.domain.com`.

#### MINIO_PUBLIC_IPS

This is comma separated list of IP addresses to which buckets created on this MinIO instance will resolve to. For example,
a bucket `bucket1` created on current MinIO instance will be accessible as `bucket1.domain.com`, and the DNS entry for
`bucket1.domain.com` will point to IP address set in `MINIO_PUBLIC_IPS`.

            proxy_set_header Host $http_host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-NginX-Proxy true;

            # This is necessary to pass the correct IP to be hashed
            real_ip_header X-Real-IP;

            proxy_connect_timeout 300;
            

            proxy_set_header Host $http_host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-NginX-Proxy true;

            # This is necessary to pass the correct IP to be hashed
            real_ip_header X-Real-IP;

            proxy_connect_timeout 300;
            

你可能會租一台雲端伺服器（虛擬機）或類似的服務，並擁有一個<dfn title="不會隨時間改變；非動態的">固定</dfn>的**公用 IP 位址**。

在 DNS 伺服器中，你會設定一個紀錄（「`A record`」）指向**你的網域**所對應的**伺服器公用 IP 位址**。

這通常在初次建置時設定一次即可。

/// tip

「網域名稱」是發生在 HTTPS 之前的事情，但一切都依賴網域與 IP 位址，因此在此一併說明。

///

### DNS { #dns }

現在聚焦在實際的 HTTPS 部分。

首先，瀏覽器會向 **DNS 伺服器**查詢該**網域的 IP**，例如 `someapp.example.com`。

DNS 伺服器會回覆要使用的**IP 位址**，那就是你在 DNS 伺服器中設定的、伺服器對外的公用 IP 位址。